Turn signal lights are direction indicators designed to allow the operator of a vehicle to give a signal of intention of turning right or left. These lights blink on and off, or “flash”, at a frequency of between 60 and 120 flashes per minute in simultaneous or opposite phase when the turn signal flasher is actuated by the turn signal operating stalk (a horizontal lever protruding from the side of the steering column). A vehicle has the turn signal lights mounted near the left and right front and rear corners of the vehicle. They are positioned symmetrically about the vertical centerline and located as far apart as practical, with a height between 15 and 83 inches above the road surface. Turn signal lights are sometimes also mounted on the sides or on the side mirrors of a vehicle to supplement the front and rear turn signals.
at the Open Lighting Product Directory (OLPD)
